Question

当我提交表单时，标签控件背后的代码给我一个空值。如何将值添加到局部变量？

请告知。

JAVASCRIPT

$(document).ready(function () {
    $(".chk").change(function () {
        var total = 0;
        var chks = $(".chk input:checked");
        if (chks.length > 0) {
            for (var i = 0; i < chks.length; i++) {
                total += parseFloat($("#" + chks[i].id.replace("courseID", "lblcoursePrice")).html());
                $("#<%=courseListView.ClientID %> [id*=hfTotal]").val("");
            }
        }

        $("#<%=courseListView.ClientID %> [id*=lblTotal]").text(total.toFixed(2));
        $("#<%=courseListView.ClientID %> [id*=hfTotal]").val($(this).val());
    });
});

.NET PAGE

<asp:GridView ID="courseListView" AutoGenerateColumns="false" runat="server" ShowFooter="true">
                                        <Columns>
                                            <asp:BoundField DataField="ID" HeaderText="ID" />
                                            <asp:TemplateField>
                                                <ItemTemplate>
                                                    <asp:CheckBox ID="courseID" class="chk" runat="server" />
                                                   <asp:Label ID="courseTitle" Text='<%# Eval("name") %>' runat="server"></asp:Label>
                                                </ItemTemplate>
                                                <FooterTemplate>
                                                    <asp:Label ID="Label2" Text="Total" runat="server"></asp:Label>
                                                </FooterTemplate>
                                            </asp:TemplateField>
                                            <asp:TemplateField HeaderText="Price">
                                                <ItemTemplate>
                                                    <asp:Label ID="lblcoursePrice" Text='<%# Eval("price") %>' runat="server"></asp:Label>
                                                </ItemTemplate>
                                                <FooterTemplate>
                                                    <asp:Label ID="lblTotal" Text="" runat="server"></asp:Label>
                                                    <asp:HiddenField ID="hfTotal" runat="server" />
                                                </FooterTemplate>
                                            </asp:TemplateField>

                                        </Columns>
                                    </asp:GridView>

代码背后

 Label courseAmount = (Label)FindControl("lblTotal");
    if (courseAmount != null)
    {
        course = courseAmount.Text; //courseButtonList.SelectedValue;
    }

Answer 1

因为我无法确定您在哪里找到此Label控件。我会给你选择。

首先：在页面加载或其他一些功能

Label courseAmount = (Label)courseListView.Rows[0].Cells[0].FindControl("lblTotal");

第二：在courseListView_RowDataBound中，您可以像：

一样打电话

if (e.Row.RowType == DataControlRowType.DataRow) 
{ 
    Label lbl= (Label)e.Row.FindControl("lblTotal"); 
}

第三：

protected void courseListView_RowCommand(object sender, GridViewCommandEventArgs e)
{
    GridViewRow valu = (GridViewRow)((LinkButton)e.CommandSource).NamingContainer;
    int RowIndex = valu.RowIndex;
    Label value = (Label)courseListView.Rows[RowIndex].FindControl("lblTotal");
    string course = value.Text;
}

如何从后面的代码中获取在gridview中使用jquery更改的标签文本

1 个答案: